Figure 1.

aPlot of the structures and total electronic densities of B12H6. Note that the density of electrons is weaker at the center of the “boron ring.”bQuasi-planarCsstructure of B12H8, which is the energetically preferred configuration for B12with 4 H2molecules, attached to it.cA contour plot of NICS(x,y) for B12H6in plane (left) and at 1 Å above the planar molecule (right)